Tubular instrument to reduce vein trauma and related devices and methods

A delivery device to deliver a tubular instrument into a catheter extending distally from a catheter adapter, the delivery device comprising:

• a housing configured to couple to the catheter adapter;
• and
• the tubular instrument configured to insert through the catheter, the tubular instrument comprising a distal end, a proximal end, and a lumen extending between the distal end and the proximal end, wherein the distal end comprises a distal tip, wherein the distal tip is closed, wherein the distal end further comprises a first annular layer and a second annular layer, wherein the first annular layer is disposed within the second annular layer, wherein the first annular layer comprises a first material, wherein the second annular layer comprises a second material, wherein the first material has a greater durometer than the second material.

A delivery device to deliver a tubular instrument into a catheter, the delivery device comprising:

• a housing configured to couple to the catheter adapter;
• and
• the tubular instrument configured to insert through the catheter, the tubular instrument comprising a distal end, a proximal end, and a lumen extending between the distal end and the proximal end, wherein the distal end comprises a distal tip, wherein the distal tip is closed, wherein the distal end further comprises an annular wall, wherein the annular wall comprises a first annular section and a second annular section distal to the first annular section, wherein a durometer of the first annular section is greater than a durometer of the second annular section.